EP0219662A1 - Escape chute - Google Patents

Escape chute Download PDF

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Publication number
EP0219662A1
EP0219662A1 EP86112105A EP86112105A EP0219662A1 EP 0219662 A1 EP0219662 A1 EP 0219662A1 EP 86112105 A EP86112105 A EP 86112105A EP 86112105 A EP86112105 A EP 86112105A EP 0219662 A1 EP0219662 A1 EP 0219662A1
Authority
EP
European Patent Office
Prior art keywords
chute
escape
inner tube
escape device
friction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86112105A
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German (de)
French (fr)
Inventor
Thomas Leisman
Jon Huston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DYNAVAC Inc
Original Assignee
DYNAVAC Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DYNAVAC Inc filed Critical DYNAVAC Inc
Publication of EP0219662A1 publication Critical patent/EP0219662A1/en
Withdrawn legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00Devices for lowering persons from buildings or the like
    • A62B1/20Devices for lowering persons from buildings or the like by making use of sliding-ropes, sliding-poles or chutes, e.g. hoses, pipes, sliding-grooves, sliding-sheets

Definitions

  • THIS INVENTION relates to apparatus for escape during emergency situations and, more specifically, it relates to an improved chute through which individuals may escape.
  • U.S. Patents 3,973,644; 3,977,495 and 4,005,762 disclose multiwalled chutes which are said to be elastic in a circumferential direction but not in a longitudinal direction.
  • U.S. Patent No. 3,944,366 discloses a system having a cylindrical outer tube and a zig-zag inner tube with the latter being said to reduce the rate of descent.
  • an escape device comprising a tubular escape chute having an upper end and a lower end, and fastener means extending generally longitudinally along at least a portion of such chute, whereby entry into such chute or egress therefrom may be accomplished intermediate the upper end and lower end.
  • the chute consists of an inner tube and an outer tube which are secured to each other.
  • the inner tube may be composed of a material such as canvas and have the friction-creating panel secured thereto.
  • the inner tube material may be friction-­creating and substitute for the friction-creating panel.
  • the exterior material preferably is composed of or has a constituent which is heat reflective.
  • an escape device comprising an elongated escape chute body having an inner tube, said inner wall having an elongated pleated zone, and an elastic material secured to said pleated zone for resisting opening of said pleats, whereby an individual passing through said chute will be in intimate resiliently maintained contact with said inner tube.
  • Figure 3 shows a view of the outer tube 76 which has an upper end 70 and a lower end 72 as viewed from a different diametric position than that from which the view of the inner tube shown in Figure 2 is taken.
  • Zipper 78 would be aligned with a corresponding opening such as 79 in the inner tube 60 in a manner which will be described hereinafter.
  • the inner tube 60 and outer tube 76 are fixedly secured to each other to function as a unit.
  • the inner tube may be made of a material such as canvas, for example, with the friction-creating panel 62 being composed of a durable material having a higher coefficient of friction than canvas.
  • the outer tube 76 be composed of a durable material which has a heat-reflecting characteristic.
  • aluminised materials Such materials may be fabrics woven out of aluminium-containing fibre or may include solid webs of aluminium of a foil thickness, for example. It is desired that the composite chute be flexible and compressible both in an axial direction and in a transverse direction.
  • entry into and discharge from the escape chute may be effected at various elevations.

Abstract

An escape device comprises a tubular escape chute 40 with upper and lower ends, and at least one sliding clasp fastener 42 extends longitudinally at least along a portion of the chute in order to provide for entry into or exit out of the chute at different elevations. The chute has a friction-creating material which extends through a major portion of the longitudinal extent of the chute to slow the descent of an individual in the chute. The chute may have pleats 112, 114 resiliently maintained by an elastic member 118. The chute may consist of an inner tube and an outer tube.

Description

  • THIS INVENTION relates to apparatus for escape during emergency situations and, more specifically, it relates to an improved chute through which individuals may escape.
  • It has been known to provide various emergency escape devices for use in buildings, on vessels at sea and for other locations where safe and rapid emergency evacuation of individuals may be required in order to prevent death and prevent or minimise injuries resulting from disasters such as fires, explosions or other emergency situations.
  • U.S. Patents 4,099,595; 4,099,596; and 4,339,010 disclose the use of chutes as escape devices. Disclosed are systems wherein such chutes contain discrete local braking elements which are adapted to retard the rate of descent of an individual employing the same. These disclosures also contain reference to a landing pad disposed at the bottom of a chute to facilitate the transition between generally vertically directed descent within the chute and discharge therefrom onto land. While these prior patents have represented advance over the prior art, the arrangements of these patents still have some disadvantages which limit the effectiveness of these arrangements for certain uses.
  • U.S. Patents 4,164,990 and 4,2465,980 also show features of interest. The former discloses slide fasteners in evacuation apparatus.
  • U.S. Patents 3,973,644; 3,977,495 and 4,005,762 disclose multiwalled chutes which are said to be elastic in a circumferential direction but not in a longitudinal direction.
  • U.S. Patent No. 3,944,366 discloses a system having a cylindrical outer tube and a zig-zag inner tube with the latter being said to reduce the rate of descent.
  • U.S. Patent No. 4,122,934 discloses an inflatable wall chute.
  • U.S. Patent No. 4,122,934 discloses a chute having an elastomeric coating which is said to provide similar coefficients of friction in both wet and dry conditions. See also U.S. Patent No. 4,434,870.
  • British Patent No. 9,947 (1908) discloses a protective outer chute which houses a pad which in turn is secured to a cable.
  • These prior patents disclose tubes which, whilst being collapsible, are fixed in length thereby necessitating cutting if evacuees are to be removed from a building, for example, at different elevations. Also, where local elastic strips are provided to afford a braking action such strips injure the user and may damage the chute.
  • It will be appreciated, therefore, that there remains a need for an improved escape chute, and it is an object of the invention to provide such an improved escape chute.
  • According to one aspect of the invention, there is provided an escape device comprising a tubular escape chute having an upper end and a lower end, and fastener means extending generally longitudinally along at least a portion of such chute, whereby entry into such chute or egress therefrom may be accomplished intermediate the upper end and lower end.
  • In addition, the chute preferably has a friction-creating panel disposed interiorly of and extending through a major portion of the chute's longitudinal extent. This permits an individual descending within the chute to have continuous frictional force applied to resist excessive rates of descent. The chute is preferably composed of a flexible material and has the friction-­creating panel extending circumferentially less than the full circumference of the chute. More than one such friction-creating panel may be provided in order to cover different areas of the chute in local fashion, if desired.
  • In a preferred embodiment, the chute consists of an inner tube and an outer tube which are secured to each other. The inner tube may be composed of a material such as canvas and have the friction-creating panel secured thereto. In another embodiment, the inner tube material may be friction-­creating and substitute for the friction-creating panel. The exterior material preferably is composed of or has a constituent which is heat reflective.
  • According to another aspect of the invention, there is provided an escape device comprising an elongated escape chute body having an inner tube, said inner wall having an elongated pleated zone, and an elastic material secured to said pleated zone for resisting opening of said pleats, whereby an individual passing through said chute will be in intimate resiliently maintained contact with said inner tube.
  • Embodiments of the invention are described below by way of example, with reference to the accompanying drawings wherein:-
    • FIGURE 1 is a partially schematic elevational view of a preferred form of apparatus embodying the present invention,
    • FIGURE 2 is a perspective view of a form of inner tube employable in the apparatus,
    • FIGURE 3 is a perspective view of an outer tube employable in the apparatus,
    • FIGURE 4 is a fragmentary elevational view showing a modified form of apparatus embodying the invention,
    • FIGURE 5 is a partially schematic fragmentary view illustrating a means of securing a zipper to a two-walled chute embodying the present invention;
    • FIGURE 6 is a perspective view, schematically illustrating securement of a zipper to apparatus embodying the present invention,
    • FIGURE 7 is a schematic cross-sectional illustration of a modified form of the apparatus showing the inner tube in restricted position,
    • FIGURE 8 is an enlarged illustration of a pleated portion of Figure 7,
    • FIGURE 9 is a schematic cross-sectional illustration of the structure of Figure 7 in expanded position.
  • Referring now more specifically to Figure 1 there is shown a preferred form of the apparatus embodying the present invention. In this embodiment, an upper support bracket has an anchoring member 2 with a projecting support member 4 and a depending support 6 to which are secured strap member 8 and support member 10 which is provided with anchor portion 12 and connector portion 14. By means of openings in the anchor members 2 and 12 the apparatus may be secured to a building or other structural member by any convenient means such as by a respective pipe or rod passing through the opening in each anchor member and being anchored by any desired means (not shown) to the structure. This support structure in turn supports the chute support 20 which is preferably substantially annular in shape. A conical portion 22 is secured to member 20 by mechanical fasteners such as nuts and bolts or grommets 26, 28, 30, 33, 34 for example. A depending tubular chute portion 40 has an upper end 24 and a lower end 43. The upper end 24 is secured by any desired means, for example, by threaded connection or by mechanical fasteners, to the transition portion 22.
  • In a preferred embodiment of the invention in order to permit entry into the chute or egress therefrom at various elevations a longitudinally oriented zipper (i.e. sliding clasp fastener) 42 is provided in the wall of chute 40. This zipper 42 which preferably is operable from either the inside of the tubular chute 40 or the outside thereof, and may also be operable with either from the lower extremity or the upper extremity, permits the chute to function as a variable height member thereby eliminating the problem of certain prior art devices wherein a fixed length chute was employed. The lower end of the chute 43 terminates in a slide 46 and an opening 44 out of which individuals descending within the chute may emerge.
  • Referring to Figures 2 and 3 additional details of a preferred form of chute of the present invention will now be considered. In a preferred embodiment the chute 40 will be of tubular, generally cylindrical configuration and have an inner tubular member such as is shown in Figure 2 and an outer tubular member such as is shown in Figure 3 secured thereto. Figure 2 illustrates a rear view of the inner chute 60 which has an upper end 64 and a lower end 66. The chute interior has a friction-creating panel 62 which serves to provide a continuous longitudinally oriented member to slow the rate of descent of an individual within the tube. This friction-­creating panel 62 is preferably composed of a material which has a higher coefficient of friction than a remaining portion of inner tube 60. It also has a circumferential extent which is preferably less than the full circumference of the inner tube. If desired, one may employ two or more such panels and the expression, "friction-creating panel" as used herein shall be deemed to be generic to both single panels and multiple panels.
  • The panel 62 is preferably substantially coextensive with the longitudinal extent of the inner tube 60 and has a minimum circumferential extent which is adequate to be readily engaged by an individual descending within the chute. While, if desired, the entire inner tube could be made of the material of which the friction-creating panel is made thereby eliminating the need for a separate panel secured to the inner tube, it is preferred to provide one or more inner tube friction-creating panels as separate members secured thereto. The opening provided by tube 60 is preferably sized so that a human being passing downwardly within the tube will contact the interior surfaces of the inner tube 60. If desired, a suitable friction enhancing coating material may be employed in lieu of or in addition to the panels.
  • Figure 3 shows a view of the outer tube 76 which has an upper end 70 and a lower end 72 as viewed from a different diametric position than that from which the view of the inner tube shown in Figure 2 is taken. Zipper 78 would be aligned with a corresponding opening such as 79 in the inner tube 60 in a manner which will be described hereinafter.
  • In the preferred embodiment the inner tube 60 and outer tube 76 are fixedly secured to each other to function as a unit. The inner tube may be made of a material such as canvas, for example, with the friction-creating panel 62 being composed of a durable material having a higher coefficient of friction than canvas. It is preferred that the outer tube 76 be composed of a durable material which has a heat-reflecting characteristic. Among the preferred materials are aluminised materials. Such materials may be fabrics woven out of aluminium-containing fibre or may include solid webs of aluminium of a foil thickness, for example. It is desired that the composite chute be flexible and compressible both in an axial direction and in a transverse direction. The flexibility in the axial direction would permit storage in an axially compressed position, if desired, and flexibility in a transverse direction would permit yielding of the walls as an individual descends. It will be appreciated that the continuous internal panel 62 which may assume any angular circumferential extent as desired serves to eliminate the need for axially-spaced multiple resilient bumper members such as are shown in the prior art.
  • Referring now more specifically to Figure 4 there is shown a further embodiment of the invention. In this embodiment of the invention, two separate zipper means are provided. An upper zipper 80 is provided within an upper section of the tube 40 and a lower zipper 82 which is preferably generally aligned with zipper 80 is provided within the lower portion of tube 40. A barrier member 84 which serves to separate the two zippers is provided. In this manner, the zippers may be operated independently each other to create the capability of independently opening, closing or partially opening either zipper. If desired, additional zippers may be employed.
  • Referring to Figure 5 in greater detail there is shown a means by which a zipper 90 may be secured to an inner wall 92 and an outer wall 94, for example, by stitching 96. Figure 6 shows a further refinement adopting the embodiment of Figure 4 wherein the zipper 90 is secured to inner wall 92 and outer wall 94 by stitching. Barrier member 84 separates zipper 80 from 82.
  • Referring to Figures 7, 8 and 9, a different means of retarding the rate of descent and which may be used in addition to or in lieu of the friction creating panel or coating disclosed hereinbefore, may be used, such different means taking the form of expansible portions. As is shown in these figures, the inner tube 110 which is preferably made of substantially nonexpanding material, is provided with pleats 112, 114. Secured to inner tube 110 by any suitable means such as stitching at 120, 122, for example, is an elastic material 118. The inner tube 110 in unstretched condition is preferably of sufficiently small diameter to be in intimate engagement with a person descending the chute. To the extent to which the person is larger than the opening, the elastic panel 118 will expand thereby causing expansion of the inner tube while remaining in intimate contact with the person. Figure 9 shows the inner tube 110 with the pleats expanded against the resistance of the elastic material. This resilient effect will retard the rate of descent. The expanded elastic material covers an arc corresponding to angle B which is greater than angle A (Figure 7).
  • The elastic material 118 and the pleats are preferably longitudinally coextensive with the chute. More than one elastic panel with associated pleats may be employed if desired. Whilst various materials may be employed, examples of presently preferred materials will be provided. The inner tube may be composed of a suitable synthetic fabric such as nylon, for example. The material is preferably treated with a suitable fire retardant. A suitable material is that sold under the designation 500 Denier Condura with light K-­Kote. A polyester elastic is a suitable material for the elastic strip. A suitable material for the outer tube is Gentex No. 1095 which is an aluminised spun Kevlar (duPont) Twill.
  • It will be appreciated, therefore, that the embodiments of the invention described with reference to the drawings represent an improved form of escape device which is adapted to establish better control over the rate of descent of a descending individual and also is adapted to provide access at desired longitudinal positions of the chute for either ingress of egress of an individual. All of this is accomplished in an effective, economical and simple manner.
  • The embodiments of the present invention described facilitate more efficient and safe egress of individuals from a building or other location than known devices.
  • Furthermore, entry into and discharge from the escape chute may be effected at various elevations.
  • The provision of continuous friction-generating contact between an individual using the chute and the chute interior controls the rate of descent of the individual more effectively than has been possible hitherto.
  • Furthermore, the escape chutes described with reference to the drawings are economical to manufacture, durable and easy to use even by those unskilled in the use of the equipment.
  • It will be appreciated that certain variations in the invention may be made without departing from the scope thereof. For example, the upper extremity of the chute need not be secured by means having the specifically illustrated form. Also, if desired, the lower slide 46 may be eliminated entirely or a modified form of slide may be employed. While the apparatus is advantageous for use with persons, it will be appreciated that it may also be used for animals or property.
  • Whilst it is preferred to use sliding clasp fasteners or "zippers", it will be appreciated that other forms of opening and closure systems whereby the circumferentially continuous wall of the chute may be opened completely or partially along one or more longitudinal lines may be used.
  • Whereas particular embodiments of the invention have been described above for purposes of illustration it will be appreciated by those skilled in the art that numerous variations of the details may be made without departing from the invention as described in the appended claims.
  • The features disclosed in the foregoing description, in the following claims and/or in the accompanying drawings may, both separately and in any combination thereof, be material for realising the invention in diverse forms thereof.

Claims (10)

1. An escape device comprising a tubular escape chute having an upper end and a lower end, and fastener means extending generally longitudinally along at least a portion of such chute, whereby entry into such chute or egress therefrom may be accomplished intermediate the upper end and lower end.
2. An escape device comprising an elongated escape chute body having an inner tube, said inner tube having an elongated pleated zone, and an elastic material secured to said pleated zone for resisting opening of said pleats, whereby an individual passing through said chute will be in intimate resiliently maintained contact with said inner tube.
3. An escape device according to claim 2 wherein said pleated zone and said elastic material are longitudinally substantially co-extensive with said inner tube.
4. An escape device according to any preceding claim wherein the chute has a friction-creating material extending over a major portion of the chute's longitudinal extent, whereby an individual descending in such chute and contacting said panel will have his or her rate of descent retarded.
5. An escape device according to claim 4 wherein said friction-creating material extends circumferentially less than the full circumference of said chute.
6. An escape device according to claim 5 wherein said friction-creating material extending generally continuously from a portion generally adjacent to said upper end of said tubular escape chute to a position generally adjacent to said lower end of said tubular escape chute.
7. An escape device according to any preceding claim wherein said tubular escape chute has an inner tube and an outer tube.
8. An escape device according to claim 7 wherein said outer tube is composed at least in part of a heat-reflecting material.
9. An escape device according to any preceding claim wherein said fastener means comprises at least two zippers or sliding clasp fasteners disposed within different longitudinal sections of said tubular escape chute.
10. An escape device according to claim 9 wherein said zippers are generally aligned with each other.
EP86112105A 1985-10-15 1986-09-01 Escape chute Withdrawn EP0219662A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/787,258 US4681186A (en) 1984-10-12 1985-10-15 Escape chute
US787258 1985-10-15

Publications (1)

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EP0219662A1 true EP0219662A1 (en) 1987-04-29

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Family Applications (1)

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EP86112105A Withdrawn EP0219662A1 (en) 1985-10-15 1986-09-01 Escape chute

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US (1) US4681186A (en)
EP (1) EP0219662A1 (en)
JP (1) JPS6294179A (en)
KR (1) KR870003800A (en)
AU (1) AU6383086A (en)
BR (1) BR8603207A (en)
ES (1) ES296889Y (en)
ZA (1) ZA867818B (en)

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US4778031A (en) * 1987-12-16 1988-10-18 Dynavac, Inc. Escape chute
JPH01176453U (en) * 1988-05-31 1989-12-15
US5320195A (en) * 1992-12-31 1994-06-14 Evac Systems, Inc. Rescue chute
US5871066A (en) * 1998-07-23 1999-02-16 Reece; Norman Lee Rescue device
US6098747A (en) * 1999-04-08 2000-08-08 Reece; Norman Lee Rescue chute
CA2292024A1 (en) * 1999-12-07 2001-06-07 David Lawrence Bockhold Emergency passenger evacuation chute and chute/slide combination for aircraft
US7159823B1 (en) * 2000-10-10 2007-01-09 Cerberus Institute For Research And Development, Inc. Rapid deployment of troops and cargo
US6330932B1 (en) * 2001-01-25 2001-12-18 Norman Lee Reece Frame for rescue device
US6598703B1 (en) * 2002-05-21 2003-07-29 Roberto Sanchez Catalan Externally concealable, modular high-rise emergency evacuation apparatus with pre-qualified egress
US20080245612A1 (en) * 2003-10-02 2008-10-09 Salvatore Catania Moldular, External Emergency Structure Particularly Suitable for use as a Fire Escape
WO2017147723A1 (en) * 2016-03-02 2017-09-08 Miranda Naranjo Oscar Iván System for collecting and transporting fruit or the like from hillsides or the like

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DE1708076B (en) * Michel-Tremp, Kaspar, Netstal (Schweiz) Rescue device
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US3973644A (en) * 1973-06-05 1976-08-10 Societe Soberal S.A. Rescue apparatus
US3994366A (en) * 1973-11-07 1976-11-30 Fujikura Rubber Works Limited Slip down way embarking device
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US3973644A (en) * 1973-06-05 1976-08-10 Societe Soberal S.A. Rescue apparatus
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Also Published As

Publication number Publication date
BR8603207A (en) 1987-06-02
KR870003800A (en) 1987-05-04
AU6383086A (en) 1987-04-16
JPS6294179A (en) 1987-04-30
ZA867818B (en) 1987-08-26
ES296889U (en) 1988-03-01
US4681186A (en) 1987-07-21
ES296889Y (en) 1988-11-16

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